Times are changing
I agree with your basic points. However times DO change.
20 years ago every building you went into was filled with cigarette smoke.
Smoking was permitted everywhere including workplaces, college classrooms and on public transportation.
Same with integration (in the U.S.)
Nowadays much has changed, and the world is much better for it.
I agree we have a culture today that places a certain stigma on children of singler parents. But lets' face it, with divorce as common as it is, there are a great many kids out there who only have one parent.
I'm not sure where I stand on this issue, but I think the social aspects of it are changing now and will continue to change.
P.S. I believe Perth is in Australia.